Knotweed
By Sanmcgill
Knotweed (Polygonum) - A vast family, comprising 150 species of world-wide distribution, the majority insignificant weeds, but with several noble plants well worth considering for their beauty of form.
Knotweed
Polygonum species
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Tall Knotweed - profile
Scientific name: Persicaria elatior
Conservation status in NSW: Vulnerable
National conservation status: Vulnerable ...
Bearded Knotweed is an erect annual herb, 30-60 cm tall, sometimes prostrate simple-branched, annual, herb. Stem is hairless, lineolate- grooved. Leaves are 1.5-15 x 0.25-3.
Japanese knotweed foliage
The problem
Japanese knotweed was introduced from Japan in 1825 as an ornamental plant. The plant is not unattractive but its rapid annual growth and relentless spread, allows it to easily overwhelm other garden plants.
Japanese Knotweed, Mexican Bamboo, Reynoutria
Scientific Name: Polygonum cuspidatum Sieb. & Zucc.
Synonym: Fallopia japonica, Pleuropterus zuccarinii, Polygonum zuccarinii, Pleuropterus cuspidatus, Polygonum japonicum, Reynoutria japonica ...
Japanese Knotweed
Scientific name: Fallopia japonica (Houtt.) Ronse Decr.
Synonym: Polygonum cuspidatum Siebold & Zucc.
Japanese knotweed is an invasive weed that threatens native plant habitats. More on this topic from Invasive Plant Atlas of New England.
Japanese knotweed is designated a noxious weed in the State of Washington.
Knotweed, Smartweed, Fleece Vine
po-LI-go-num
About 150 species of mostly annuals and herbaceous perennials, some aquatic vine-like scamblers or woody subshrubs; stems appear jointed (bamboo-like).
Knotweed is a perennial plant that has a very distinct look that makes it easy to identify. The plant's official name is Japanese knotweed which is how it's often referred to in the gardening world.…
How to Save a Dying Bamboo Plant ...
Virginia Knotweed, Jump Seed, Knotweed,Virginia
Species:
Polygonum virginianum ...
Japanese knotweed spreads rapidly and regenerates swiftly. Traditional chemical controls don't always work, but can natural remedies be more effective?
The Tiger Lily ...
Japanese knotweed
Also known as Quebec or Mexican bamboo (Fallopia japonica, syn.Polygonum cuspidatum), quickly reaches 120 to 180 centimetres and forms a dense, arching silhouette with tiny, pink to white flowers.
The Alpine Knotweed (P. viviparum, Linn.), a small perennial, only 4 to 8 inches high, found in British mountain alpine pastures, is peculiar in that its slender, spike-like raceme of white or pinkish flowers bears in its lower portion, ...
- Smartweed, Knotweed (Polygonum species)
- Smooth Aster (Aster laevis)
- Spiderwort (Tradescantia ohiensis) ...
Common names: Knotweed, snake root, fleeceflower and bistort.
History: 'Superba' is derived from the more common Bistort, a native of Britain. The perennial plant of the buckwheat family was found in Britain.
Polygonaceae: The Knotweed Family
Coccoloba - Coccoloba Trees
Coccoloba diversifolia - Pidgeon Plum
Coccoloba uvifera - Seagrape ...
The largest genus of the family, Polygonum (or Persicaria), contains the knotweeds and the smartweeds, found in many parts of the world. The common smartweed (P. hydropiper) is an annual sometimes called water pepper for its acrid quality.
Galingale, Gallant Soldier, Garden Angelica, Garden Lupin, Garden Rockcress, Garlic Mustard, Garlic Pennycress, Germander Speedwell, Ghost Orchid, Giant Bellflower, Giant Fescue, Giant Hogweed, Giant Knotweed, Giant-rhubarb, Gipsywort, Gladiolus, ...
Knotweed (Polygonum capitatum)
Kobold (Gaillardia aristata 'Goblin')
Koelreuteria bipinnata
Koelreuteria paniculata
Koelreuteria paniculata 'September'
Kolkwitzia amabilis
Kolkwitzia amabilis 'Pink Cloud'
Kolomikta Actinidia (Actinidia kolomikta) ...
Family Polygonaceae, Knotweeds
Genus Polygonum, the Knotweeds or Smartweeds, a highly variable genus, which includes annual or perennial forbs and shrubs. Some species are viney. The leaves are usually simple and alternate.
Weed Control: Apply postemergence herbicides as needed for control of summer annual and perennial broadleaf weeds such as knotweed and spurge. Use Vantage T&O (sethoxydim) to control grassy weeds such as crabgrass and goosegrass.
When gardeners talk about using seaweed on their plants, they are usually referring to a brown algae, specifically the one known as knotweed or rockweed (Ascophyllum nodosum).
Previous Species -- Virginia Knotweed (Polygonum virginianum)
Return to Species List -- Group 8
Next Species -- Yellow Trumpets (Sarracenia alata)
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Persicaria polymorpha is sometimes confused with Polygonum cuspidatum or Japanese Knotweed, which is considered an invasive. I haven't seen anything to suggest that Persicaria polymorpha should be grown with caution, but please let me know if you do.
Douglas's black hawthorn, Douglas spirea, Douglas seaside tansy, Douglas's knotweed, Douglas's widow-grass, & so on, besides such fauna as the Douglas squirrel & the Douglas short-horned lizard.
The plant has many English names, mostly referring to its remarkable properties: Pepper Plant, Bity Tongue, Biting Knotweed, Marsh Pepper, Smartweed, Smartass, Arsesmart, Arsenicke. Other names include: Red Knees, Bloodwort, Ciderage, and Culrage.
EnglischLaksa plant, Vietnamese mint, Fragrant knotweed
FranzösischRenouée odorante
Hmong ...
How to kill Ivy
How to kill Bindweed and Bellbind
Killing Japanese Knotweed
How to Kill Stinging Nettles ...
Index- plants in this Family
Cuscutaceae / Dodder Dodder (Cuscuta )
Dodder is also known as Knotweed, Love Vine and dozens of other names.. ...
Imported plants, such as Japanese knotweed and Himalayan balsam, can also become invasive, eventually pushing out native species and altering habitats.
 See also: May, Japanese Knotweed, Green, Grass, Pink
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